Jeff Weinberg, W8CQ

Your World-Wide Source For Amateur Radio Amplifier Parts & Upgrade Kits

Your World-Wide Source For Amateur Radio Amplifier Parts & Upgrade Kits
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PM-400 Replacement Power Supply Module for L-4/L-4B/L-7 Amplifier


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The PM-400 is a complete replacement power supply module for the Drake L-4/L-4B/L-7 remote power supply. It is designed around and features new modern 220 μF 450VDC electrolytic capcitors, 1000 PIV 3A diodes, new 100K 3W bleeder resistors.  The unit installs easily in the remote power supply chassis and replaces both of the old diode/capacitor boards. You may purchase the printed circuit board and insulating fish paper (for those customers who wish to supply their own capacitors, diodes and resistors) or the complete kit.

Additional information

Weight 0.90 lbs
Dimensions 8.5 × 5.5 × 2.0 in
Kit Type

PC Board & Fish Paper, Complete Kit